Rudolf eickemeyer



(NoModelJ- Y R. BICKEMEYER, Deod.

-R. EIGKEMEYER, JR, Executor.

MAGNETIC SEPARATOR.

No 567,382. Patented Sept. 8, 1896.

UNITED STATES PATENT 'VOFFICE'.

RUDOLF EICKEMEYER, OF YONKERS, NEW YORK; RUDOLF EICKEMEYER,

JR. EXECUTOR OF SAID RUDOLF 'EIOKEMEYER, DECEASED.

MAGNETIC SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 567,382, datedSeptember8, 1896.

Application filed. January 28, 1890. Serial No. 338,399. (No model.)

To all whom it may concern/L Be it known that I, RUDoLF EICKEMEYER, ofYonkers, in the county of Vestchester and State of New York, haveinvented certain patent to Wenstrom, November 15, 1887, No. In all priormachines of this type,

373,211. the iron bars by which the iron to be separated is collectedand carried alternate with each other as to polarity while passing thefaces of the electromagnet, but the polarity of each bar during thattime does not change. Such machines in operating upon a charge of mixedmatter specially rich in particles of iron, or when the ironoccasionally constitutes a considerable proportion of the immediatemass, the iron is so grouped or bunched upon the bars as to causeconsiderable quantities of non-magnetic matter to be embraced andcarried by the bunched iron, thus in a measure defeating the end sought.I have now for the first time organized with the separating-drum and itscollecting or separating bars an interior magnetic system, which sooperates that the bars while moving in their collecting path are eachintermittingly and oppositely polarized, accompanied with an interveningneutral condition. In other words, during the performance of collectingand carrying duty each of the bars will be, for instance, polarized N,and then be neutral, and then be polarized S, and so on consecutivelythroughout the whole or any desired portion of their path to theposition at which they arerequired to drop their loads. The effect ofthis magnetic system, with its intermitting shifting as topolarity,causes a corresponding frequent shifting of the relative positions ofthe particles and pieces of iron carried by the bars, which results inthe release of such non-magnetic matter as would as the bunching ofmagnetic with non-magnetic matter is most liable to occur at or duringthe initial contact of the mixed mass of matter with the surface of theseparatingdrum, satisfactory results will accrue if the shifting ofpolarity be restricted to, say, sixty or eighty degrees of the circularpathof the bars, the remaining portion of their collecting and carryingpath being opposite and adjacent to magnetic polefaces of anothermagnetic system, which will polarize each bar deemed novel will bespecified in the claim,,

hereunto annexed.

Referring to the drawings, Figure 1 illustrates a portion of theseparating-drum and the electromagnets in a machine embodying theseveral features of my invention, the drum portion being in longitudinalcentral section, the two forms of electromagnet being partially insection and partly in side View. Fig. 2 is a view of the same in centralvertical cross-section, and it also shows one of the geared drumheads inside view. Fig. 3 illustrates in longitudinal section a drum of anotherconstruction and cooperating with but one form of electromagnet, shownpartly in section and partly in side view. Fig. 4 is a centralcross-section of the same, with a geared drumhead in side view.

Referring to Figs. 1 and 2, it is to be understood that theseparatingdrum A is provided I There are in this machine two separatemagnetic systems fixed with relation to each other and supported uponand maintained in proper position by an axial supporting-bar c, which ishollow for a portion of its length to afford TOO a passage for the wiresconnecting with the v field-coils. I I it The upper magnetic system Bconsists of six iron cores or ribs (Z d d d (Z (1 arrangedlengthwise ofthe drum, and have their tops or faces located in close proximity to theinner surfaces of the cheeks a a of the bars, and each of these coreshas its own field-coil, which incloses it longitudinally, said coilshaving noiron between them and the bars, and being so energized as topolarize said bars as well as the faces of the cores alternately, as,for instance, core (I N,core cl S, core d N, and so on. These pole-facesare separated by spaces a little less than the combined width of onecollecting-bar a and one nonmagnetic bar Z), and so that eight of thebars a will occupy the same are of a circle which is occupied by the sixpole-faces, as clearly indicated in Fig. 2. It will be seen that any onebar moving over these pole-faces will be first polarized N, thenneutralized, because midway between two pole-faces, then polarized S,then neutral, then polarized N, and so on until the last pole-face clhas been passed, and it is obvious that during these shiftings orreversals in polarity that particles and pieces of iron carried upon andby said bars will be caused to correspondingly shift and change theirpositions and to cause the dislodgment of non-magnetic matter.

The lower magnetic system 0 consists of four segmental ribs or cores 6 e6 6 arranged with their convex pole-faces in close proximity to theinner surface of the cheeks of the collecting-bars, and each core islongitudinally inclosed by a field-coil of a novel character devised byme, and fully described in my aforesaid application for patent. It isdeemed ample for the purposes of this specification to indicate thatsaid coils at their ends are wound upon and around a set ofsupporting-pins, and that they are so energized as to, for instance,polarize the core 6 N, core e S, core 6 N, and c S, so that while thechecks of one-half of the bars will override cores 6 and e and becontinuously of one polarity'the rest of the bars will have their cheeksoverriding cores 6' and c and be continuously of an opposite polarity.At their upper ends these cores are each extended longitudinally, as ateflFig. 2, so as to occupy positions enabling them to promptly assumemagnetic relations with the bars after the latter have passed the coresof the other set of magnets. It will be understood that dry free-runningmixed matter containing the iron, is slowly delivered to the top of thedrum, while the latter is revolving in the direction of the arrow, Fig.2; and it will be obvious that the iron collected on the bars at theupper side of the drum cannot be so bunched as to hold and confinenon-magnetic matter because of the frequent reversals and changes in thepolarity of the bars and the consequent activity of the particles andpieces of iron, and when the already laden bars reach the second set ofmagnets a.

more or less further readjustment of the collected iron occurs, all ofwhich is highly favorable to a complete elimination of all non-magneticmatter. In this machine the variable polarityof the bars renders themless liable to permanent magnetism than when the bars are exposed to butone polarity, and so, also, do the bars more readily discharge theirmagnetism after leaving the lower magnet, and, therefore, the bars maybe relied upon to perform a carrying duty far beyond the lower side ofthe drum, thus still further facilitating the discharge of non-magneticmatter before the bars reach the point at which they begin to releasetheir loads. It will be understood that even while a bar is passing fromone pole-face to the other at the magnetic system B there is noliability of its dropping whatever iron there may then be carried by it,and that this one system of magnetization maybe employed to theexclusion of the other, as, for instance, as shown in Figs. 3 and 4. Inthis case the separating-drum A is, as before described, with theexception of the carrying-bars,which are much simpler and less expensivethan the others. These bars a have no cheeks but are merely straightbars, rectangular in cross-section, and separated by similar bars 6 ofnonmagnetic material.

In this machine the electro magnet or magnets B occupy nearly twohundred and forty degrees of the circular path of the bars, and thereare eighteen cores lengthwise of the drum, and each has its ownfield-coil directly underlying the collector-bars, and said coresalternate as to polarity, as in the magnetic system B previouslydescribed. Opposite these cores there is a portion of the drumcontaining twenty-seven bars, and each, as it travels, is intermittinglyreversed in its polarity from N to S, with an intervening neutralcondition, until it reaches its discharging position at the lower end ofthe magnetic system. are like that disclosed in my aforesaidapplication, in that neither of these electromagnets project any portionof its magnetic field in a direction opposite to the bars, which are,for the time being, to be magnetized; or, in other words, the magneticfield is so restricted that the heads of the drum cannot be magnetized,nor can the collecting-bars be affected while in the discharging portionof their circular path.

Having thus described my invention, I claim as new and desire to secureby Letters Patent In a magnetic separator, the combination substantiallyas hereinbefore described, of a rotative separating-drum, provided withlongitudinal separating-bars, and two internal stationary magneticsystems, one of which oppositely polarizes each bar intermittingly whilemoving through a portion of its circular path,and the other, causesalternating bars to be oppositely polarized while moving through anotherportion of said path.

RUDOLF EIGKEMEYER.

WVitnesses:

R. EIOKEMEYER, J11, JOHN L. CLARK.

Both of the machines shown

